-er a-a a-c aaa aac aad aae aak aao aap aar aav ac- aca acc acd ace ack aco acp acr acv ad- ada adc add ade adk ado adp adr adv aea aec aed aee aek aeo aep aer aev aka akc akd ake akk ako akp akr akv aoa aoc aod aoe aok aoo aop aor aov ap- apa apc apd ape apk apo app apr apv ar- ara arc ard are ark aro arp arr arv av- ava avc avd ave avk avo avp avr c-- caa cac cad cae cak cao cap car cav cca ccc ccd cce cck cco ccp ccr ccv cda cdc cdd cde cdk cdo cdp cdr cdv ce- cea cec ced cee cek ceo cep cer cev cka ckc ckd cko co- coa coc cod coe cok coo cop cor cov cpa cpc cpd cpe cpk cpo cpp cpr cpv cra crc crd cre crk cro crp crr crv cva cvc cvd cve cvk cvo cvp cvr cvv daa dac dad dae dak dao dap dar dav dca dcc dcd dce dck dco dcp dcr dcv dda ddc ddd dde ddk ddo ddp ddr de- dea dec ded dee dek deo dep der dev dka dkc dke dkk dko dkp dkr doa doc dod doe dok doo dop dor dov dpa dpc dpd dpe dpk dpo dpp dpr dpv dra drc drd dre drk dro drp drr drv dva dvc dvd dve dvk dvp dvr eaa eac ead eae eak eao eap ear eav ec- eca ecc ecd ece eck eco ecr ecv ed- eda edc edd ede edk edo edp edr eea eec eed eee eek eeo eep eer eev eka ekc ekd eke eko ekp ekr ekv eo- eoa eoc eod eoe eok eoo eop eor ep- epa epc epd epe epo epp epr era erc erd ere erk ero erp err erv eva evc evd eve evo evp evr evv ka- kaa kac kad kae kak kao kap kar kav kca kcc kcd kce kck kcp kcr kda kdc kde kdk kdo kdp kdr ke- kea kec ked kee kek keo kep ker kev kkc kke kkk kkp kkr kkv koa koc kod koe kok koo kop kor kpa kpc kpd kpe kpk kpo kpp kpr kpv kra krc krd krk kro krp krr krv kva kvk kvo kvp kvr kvv oaa oac oad oae oak oao oap oar oav oc- oca occ ocd ock oco ocp ocr ocv oda odc odd ode odo odp odr odv oea oec oed oee oeo oep oer oka okc okd oke okk oko okp okr oo- ooa ooc ood ook ooo oop oor oov op- opa opc opd ope opk opo opp opr opv or- ora orc ord ore ork oro orp orr orv ov- ova ovc ovd ove ovo ovp ovv p-p paa pac pad pae pak pao pap par pav pca pcc pcd pce pck pco pcp pcr pcv pda pdc pdd pde pdk pdo pdp pdr pdv pea pec ped pee pek peo pep per pev pka pkc pkd pke pko pkp pkr poa poc pod poe pok poo pop por pov ppa ppc ppd ppe ppk ppo ppp ppr ppv pra prc prd pre prk pro prp prr prv pva pvc pvd pve pvk pvo pvp pvr pvv ra- raa rac rad rae rak rao rap rar rav rca rcc rcd rce rco rcp rcr rcv rda rdc rdd rde rdo rdp rdr rdv re- rea rec red ree rek reo rep rer rev rkc rke rkk rko rkp rkv roa roc rod roe rok roo rop ror rov rpa rpc rpd rpe rpk rpo rpp rpr rpv rra rrc rrd rrk rrp rrr rva rvc rvd rve rvo rvp rvr rvv v-a v-e vaa vac vad vae vak vao vap var vav vca vcc vcd vce vco vcp vcr vdc vdd vde vdk vdo vdp vdr vdv vea vec ved vee vek veo vep ver vka vkp voa voc vod voe vok voo vop vor vov vpa vpc vpd vpe vpk vpo vpp vpr vra vrc vrd vre vrk vrp vrr vva vvc vvo vvr vvv